Home / 138,878-207,404

Finding the Third Proportional to 138,878 and 207,404

Calculator

Solution

The third proportional to 138,878 and 207,404 is: 309,742.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,878 : 207,404 = 207,404 : x
  2. Step 2: Convert to fraction form
    138,878/207,404 = 207,404/x
  3. Step 3: Cross multiply
    138,878x = 207,404 × 207,404
  4. Step 4: Simplify right side
    138,878x = 43,016,419,216
  5. Step 5: Solve for x
    x = 43,016,419,216/138,878
  6. Step 6: Final answer
    x = 309,742.50

Related Problems

Find third proportional to 69,439 and 103,702
Half scale
Find third proportional to 277,756 and 414,808
Double scale
Find third proportional to 138,880 and 207,407
Similar ratio
Find third proportional to 208,317 and 311,106
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.